Football Shirt Friday is back on November 19 and the perfect opportunity to get out the most niche jersey you have in your wardrobe.
The campaign helps raise money for the Bobby Moore Fund, which is trying to tackle bowel cancer.
On the day, while wearing a kit of their choice, fans are being urged to share a selfie on social media using #FootballShirtFriday.
Footballers, sadly, don’t always get to wear the kits they love but some legends have been pictured in a rival team’s kit before.
And it’s not as uncommon as you might think to see players widely associated with one club pulling on the jersey of another.
Testimonials are the main reason why, and there have been some truly bizarre sights over the years, which are likely to have given plenty of football fans the creeps.
So, here at talkSPORT, we’ve gone through the archives to find the most shocking and strange pictures of players in shirts you’d never expect to see them wearing.
When Jamie Carragher was a blue for the day
Liverpool fans went into a frenzy when Jamie Carragher was spotted wearing Everton training wear while interviewing Romelu Lukaku back in 2017.
Even though Carra was a boyhood Toffee, seeing the Reds legend in a blue kit was enough for many supporters to have a sudden urged to run to the bathroom.
Sir Bobby Charlton and Bobby Moore playing for Liverpool?
Look at his face, there’s no way he’s enjoying that, is he?
The Manchester United great pulled on the shirt of their bitter rivals Liverpool back in 1972, as he played in Tommy Lawton’s testimonial.
He also wore a Stoke shirt AGAINST the Red Devils in a benefit game for England teammate Gordon Banks just a year later.
Look at that picture. Madness.
Diego Maradona signs for Tottenham
He didn’t, of course, but the Argentine wizard famously did play in a Spurs shirt in his compatriot Osvaldo Ardiles’ testimonial at White Hart Lane back in 1986.
The dream signing was close, though, as Teddy Sheringham has revealed Ardiles, when Tottenham boss, tried to sign Maradona permanently in the summer of 1994.
Glenn Hoddle plays for Arsenal
Tottenham fans, look away now.
The Spurs great donned the red and white of their arch north London rivals in Paul Merson’s testimonial in 1996.
When Gazza was a Gunner (for a day)
Spurs hero Paul Gascoigne also played in that game, giving Gooners more ammunition to goad Tottenham fans with.
Gazza and Hoddle played at Highbury against an International XI, which featured the likes of Ruud Gullit, Matt Le Tissier and Chris Waddle.
Gazza even scored FOUR goals, as he led Arsenal to an 8-5 victory.
When Ronaldinho played for England
It’s an alternate reality which David Seaman will wish had existed.
Instead, the only time Ronaldinho pulled on the shirt of the Three Lions was in a 2016 Soccer Aid match between England and the Rest of the World at Old Trafford.
George Best kitted out for Chelsea, West Brom, and Ipswich
Well, he did get around…
Manchester United great once traded red for blue as he pulled on a Chelsea shirt for Peter Osgood’s testimonial in 1975, just a year after leaving Old Trafford.
A year later, he turned out in a West Brom shirt for Jeff Astle’s testimonial match at the Hawthorns.
And in 1979, he then appeared at Portman Road in an Ipswich kit for Sir Bobby Robson’s Football Benefit Match against an England XI.
Bobby Moore trades claret for the blue of Chelsea and Coventry
As well as being kitted out in a Liverpool kit, the West Ham legend also moved across the capital to play for the Hammers’ London rivals Chelsea.
The World Cup-winning captain played alongside Portuguese icon Eusebio in blue as part of John Dempsey’s testimonial in 1980.
He later also pulled on a sky blue shirt of Coventry in a celebrity match.
John Terry (begrudgingly) plays for West Ham
Okay, it’s not a proper Hammers kit, but Chelsea legend Terry turned out in this claret and blue number for Tony Carr’s testimonial in 2010.
He played alongside Frank Lampard and others on Carr’s ‘Academy All-Stars’ team, having spent time there in his youth.
One-club man?
What’s this, Gary Neville in something over than a Manchester United shirt?
The Old Trafford legend of course spent his entire playing career with his boyhood club, but was pictured wearing a Feyenoord jersey after swapping shifts after the Red Devils’ 3-1 Champions League victory over the Dutch side in 1997.
When Macca was a Hammer
When West Ham legend Alvin Martin had his testimonial at Upton Park in 1995, he invited Liverpool ace and fellow Scouser Steve McManaman to take part.
Macca was still one of Anfield’s Spice Boys at the time, but he would go on to make over 150 appearances for Real Madrid and win the Champions League twice.
That probably makes him one of the most successful players to ever wear a West Ham shirt… right?
John Obi Mikel jumps the gun
The transfer that never was.
Future Chelsea star Mikel was allegedly pressured into signing for the Red Devils before the Blues overturned his transfer to Old Trafford and landed their man.
Man United did have the Nigerian long enough to get him in their shirt, though!
Vinnie Jones plays for Nottingham Forest
The ex-Wimbledon Crazy Gang member and Hollywood superstar took time out from squeezing testicles to star in at testimonial for Mark Crossley against Derby County in 2000.
Diego Maradona moves to Germany
The Argentina legend was obviously in high demand for testimonials.
In 2000, Maradona took to the field for Bayern Munich in Lothar Mattheus’ ‘abschiedsspiel’ – that’s ‘farewell game’ to English speakers.
Chelsea hero Zola moves across London
West Ham love a testimonial, don’t they?
Chelsea legend Gianfranco Zola swapped west London for east London in 2010 as he pulled on a Hammers kit, also for Tony Carr’s testimonial.
Blues fans should be able to forgive him, though, considering he was the manager at Upton Park at the time.
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